package $2_1oo;

public class AbstractFunction {

    public static void main(String[] args) {
        // 抽象类
        Personj p = new Studentj();
        p.run();
    }
}

abstract class Personj {

    public abstract void run();

}

class Studentj extends Personj {
    @Override
    public void run() {
        System.out.println("Student.run");
    }
}